Robtex

Up: 203.123.0.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 203.123.16.0/21
Down right: 203.123.24.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.123.16.3	PTR	3.203-123-16.ngn.m1net.com.sg
203.123.16.16	PTR	16.203-123-16.ngn.m1net.com.sg
203.123.16.34	PTR	34.203-123-16.ngn.m1net.com.sg
203.123.16.114	PTR	114.203-123-16.ngn.m1net.com.sg
203.123.16.125	A	125.203-123-16.adsl.qala.com.sg
203.123.16.145	PTR	145.203-123-16.ngn.m1net.com.sg
203.123.16.147	PTR	147.203-123-16.ngn.m1net.com.sg
203.123.16.161	PTR	161.203-123-16.ngn.m1net.com.sg
203.123.16.163	PTR	163.203-123-16.ngn.m1net.com.sg
203.123.16.176	PTR	176.203-123-16.ngn.m1net.com.sg
203.123.16.194	PTR	194.203-123-16.ngn.m1net.com.sg
203.123.16.210	PTR	210.203-123-16.ngn.m1net.com.sg
203.123.16.211	PTR	211.203-123-16.ngn.m1net.com.sg
203.123.16.224	PTR	224.203-123-16.ngn.m1net.com.sg
203.123.16.225	PTR	225.203-123-16.ngn.m1net.com.sg
203.123.16.226	PTR	226.203-123-16.ngn.m1net.com.sg
203.123.16.227	PTR	227.203-123-16.ngn.m1net.com.sg
203.123.16.241	PTR	241.203-123-16.ngn.m1net.com.sg
203.123.16.242	PTR	242.203-123-16.ngn.m1net.com.sg
203.123.18.9	A	9.203-123-18.adsl.qala.com.sg
203.123.18.15	A	15.203-123-18.adsl.qala.com.sg
203.123.18.27	A	27.203-123-18.adsl.qala.com.sg
203.123.18.41	A	41.203-123-18.adsl.qala.com.sg
203.123.18.55	A	55.203-123-18.adsl.qala.com.sg
203.123.18.63	A	63.203-123-18.adsl.qala.com.sg
203.123.18.68	A	68.203-123-18.adsl.qala.com.sg
203.123.18.81	A+PTR	81.203-123-18.adsl.qala.com.sg
203.123.18.85	A	85.203-123-18.adsl.qala.com.sg
203.123.18.99	A+PTR	99.203-123-18.adsl.qala.com.sg
203.123.18.105	A	105.203-123-18.adsl.qala.com.sg
203.123.18.119	A	119.203-123-18.adsl.qala.com.sg
203.123.18.132	A+PTR	132.203-123-18.adsl.qala.com.sg
203.123.18.159	A+PTR	159.203-123-18.adsl.qala.com.sg
203.123.18.172	A+PTR	172.203-123-18.adsl.qala.com.sg
203.123.18.201	A	201.203-123-18.adsl.qala.com.sg
203.123.18.217	A	217.203-123-18.adsl.qala.com.sg
203.123.18.218	A	218.203-123-18.adsl.qala.com.sg
203.123.18.227	A+PTR	227.203-123-18.adsl.qala.com.sg
203.123.19.2	PTR	2.203-123-19.ngn.m1net.com.sg
203.123.19.10	PTR	10.203-123-19.ngn.m1net.com.sg
203.123.19.10	A	10.203-123-19.adsl.qala.com.sg
203.123.19.21	PTR	21.203-123-19.ngn.m1net.com.sg
203.123.19.21	A	21.203-123-19.adsl.qala.com.sg
203.123.19.49	A+PTR	mail.wuihong.com.sg
203.123.19.63	A+PTR	63.203-123-19.adsl.qala.com.sg
203.123.19.67	PTR	67.203-123-19.ngn.m1net.com.sg
203.123.19.67	A	67.203-123-19.adsl.qala.com.sg
203.123.19.70	PTR	70.203-123-19.ngn.m1net.com.sg
203.123.19.70	A	70.203-123-19.adsl.qala.com.sg
203.123.19.75	PTR	75.203-123-19.ngn.m1net.com.sg
203.123.19.75	A	75.203-123-19.adsl.qala.com.sg
203.123.19.97	PTR	97.203-123-19.ngn.m1net.com.sg
203.123.19.103	A	103.203-123-19.adsl.qala.com.sg
203.123.19.106	PTR	106.203-123-19.ngn.m1net.com.sg
203.123.19.106	A	106.203-123-19.adsl.qala.com.sg
203.123.19.132	PTR	132.203-123-19.ngn.m1net.com.sg
203.123.19.132	A	132.203-123-19.adsl.qala.com.sg
203.123.19.133	PTR	133.203-123-19.ngn.m1net.com.sg
203.123.19.133	A	133.203-123-19.adsl.qala.com.sg
203.123.19.134	PTR	amseer.com
203.123.19.135	PTR	135.203-123-19.ngn.m1net.com.sg
203.123.19.135	A	mail.fabseer.com
203.123.19.137	A	bkmgroup-ptnci.com
203.123.19.146	PTR	146.203-123-19.ngn.m1net.com.sg
203.123.19.146	A	mail.solotracking3g.com
203.123.19.146	A	mail.solodream.com
203.123.19.150	PTR	150.203-123-19.ngn.m1net.com.sg
203.123.19.150	A	mail.solotracking.com
203.123.19.152	PTR	152.203-123-19.ngn.m1net.com.sg
203.123.19.168	PTR	win-b0st35kidhm.dcom-asia.com
203.123.19.168	A	mail.dcom.com.sg
203.123.19.191	PTR	191.203-123-19.ngn.m1net.com.sg
203.123.19.191	A	191.203-123-19.adsl.qala.com.sg
203.123.19.199	PTR	199.203-123-19.ngn.m1net.com.sg
203.123.19.199	A	199.203-123-19.adsl.qala.com.sg
203.123.19.215	PTR	215.203-123-19.ngn.m1net.com.sg
203.123.19.215	A	215.203-123-19.adsl.qala.com.sg
203.123.19.237	A	237.203-123-19.adsl.qala.com.sg
203.123.20.41	A+PTR	41.203-123-20.1500adsl.qala.com.sg
203.123.20.64	A+PTR	64.203-123-20.1500adsl.qala.com.sg
203.123.20.82	PTR	82.203-123-20.1500adsl.qala.com.sg
203.123.20.84	A+PTR	84.203-123-20.1500adsl.qala.com.sg
203.123.20.89	A+PTR	89.203-123-20.1500adsl.qala.com.sg
203.123.20.103	A+PTR	103.203-123-20.1500adsl.qala.com.sg
203.123.20.110	A	110.203-123-20.1500adsl.qala.com.sg
203.123.20.118	A+PTR	118.203-123-20.1500adsl.qala.com.sg
203.123.20.140	A+PTR	140.203-123-20.1500adsl.qala.com.sg
203.123.20.152	A	152.203-123-20.1500adsl.qala.com.sg
203.123.20.153	A+PTR	153.203-123-20.1500adsl.qala.com.sg
203.123.20.157	A	157.203-123-20.1500adsl.qala.com.sg
203.123.20.182	A+PTR	182.203-123-20.1500adsl.qala.com.sg
203.123.20.191	A	191.203-123-20.1500adsl.qala.com.sg
203.123.20.204	A+PTR	204.203-123-20.1500adsl.qala.com.sg
203.123.20.224	A+PTR	224.203-123-20.1500adsl.qala.com.sg
203.123.20.231	A+PTR	231.203-123-20.1500adsl.qala.com.sg
203.123.21.15	A	15.203-123-21.1500adsl.qala.com.sg
203.123.21.31	A	31.203-123-21.1500adsl.qala.com.sg
203.123.21.32	PTR	32.203-123-21.1500adsl.qala.com.sg
203.123.21.34	A+PTR	34.203-123-21.1500adsl.qala.com.sg
203.123.21.66	A+PTR	66.203-123-21.1500adsl.qala.com.sg
203.123.21.70	A+PTR	70.203-123-21.1500adsl.qala.com.sg
203.123.21.76	A	76.203-123-21.1500adsl.qala.com.sg
203.123.21.78	A	78.203-123-21.1500adsl.qala.com.sg
203.123.21.85	A+PTR	85.203-123-21.1500adsl.qala.com.sg
203.123.21.86	A+PTR	86.203-123-21.1500adsl.qala.com.sg
203.123.21.100	A+PTR	100.203-123-21.1500adsl.qala.com.sg
203.123.21.124	A	124.203-123-21.1500adsl.qala.com.sg
203.123.21.132	A+PTR	mail.lta.gov.sg
203.123.21.134	A+PTR	mail3.lta.gov.sg
203.123.21.217	PTR	217.203.123.21.static.m1net.com.sg
203.123.21.217	A	217.203-123-21.1500adsl.qala.com.sg
203.123.22.2	PTR	2.203-123-22.static.m1net.com.sg
203.123.22.2	A	2.203-123-22.1500adsl.qala.com.sg
203.123.23.1	A+PTR	1.203-123-23.1500adsl.qala.com.sg
203.123.23.4	PTR	4.203-123-23.1500adsl.qala.com.sg
203.123.23.9	A	9.203-123-23.1500adsl.qala.com.sg
203.123.23.15	A	15.203-123-23.1500adsl.qala.com.sg
203.123.23.26	A	26.203-123-23.1500adsl.qala.com.sg
203.123.23.28	A	28.203-123-23.1500adsl.qala.com.sg
203.123.23.30	A	30.203-123-23.1500adsl.qala.com.sg
203.123.23.31	A	31.203-123-23.1500adsl.qala.com.sg
203.123.23.33	A+PTR	33.203-123-23.1500adsl.qala.com.sg
203.123.23.34	A+PTR	34.203-123-23.1500adsl.qala.com.sg
203.123.23.41	A	41.203-123-23.1500adsl.qala.com.sg
203.123.23.51	A+PTR	51.203-123-23.1500adsl.qala.com.sg
203.123.23.53	A	53.203-123-23.1500adsl.qala.com.sg
203.123.23.54	A	54.203-123-23.1500adsl.qala.com.sg
203.123.23.55	A	55.203-123-23.1500adsl.qala.com.sg
203.123.23.66	A+PTR	66.203-123-23.1500adsl.qala.com.sg
203.123.23.67	A+PTR	67.203-123-23.1500adsl.qala.com.sg
203.123.23.68	A	68.203-123-23.1500adsl.qala.com.sg
203.123.23.72	A	72.203-123-23.1500adsl.qala.com.sg
203.123.23.80	A+PTR	80.203-123-23.1500adsl.qala.com.sg
203.123.23.82	A+PTR	82.203-123-23.1500adsl.qala.com.sg
203.123.23.83	A+PTR	83.203-123-23.1500adsl.qala.com.sg
203.123.23.85	A	85.203-123-23.1500adsl.qala.com.sg
203.123.23.99	A+PTR	99.203-123-23.1500adsl.qala.com.sg
203.123.23.100	A	100.203-123-23.1500adsl.qala.com.sg
203.123.23.103	A	103.203-123-23.1500adsl.qala.com.sg
203.123.23.107	A	107.203-123-23.1500adsl.qala.com.sg
203.123.23.123	A	123.203-123-23.1500adsl.qala.com.sg
203.123.23.124	A	124.203-123-23.1500adsl.qala.com.sg
203.123.23.127	A	127.203-123-23.1500adsl.qala.com.sg
203.123.23.128	A+PTR	128.203-123-23.1500adsl.qala.com.sg
203.123.23.132	A	132.203-123-23.1500adsl.qala.com.sg
203.123.23.151	A	151.203-123-23.1500adsl.qala.com.sg
203.123.23.157	A	157.203-123-23.1500adsl.qala.com.sg
203.123.23.163	A+PTR	163.203-123-23.1500adsl.qala.com.sg
203.123.23.165	A	165.203-123-23.1500adsl.qala.com.sg
203.123.23.166	A	166.203-123-23.1500adsl.qala.com.sg
203.123.23.168	A	168.203-123-23.1500adsl.qala.com.sg
203.123.23.179	A+PTR	179.203-123-23.1500adsl.qala.com.sg
203.123.23.180	A	180.203-123-23.1500adsl.qala.com.sg
203.123.23.181	A	181.203-123-23.1500adsl.qala.com.sg
203.123.23.182	A	182.203-123-23.1500adsl.qala.com.sg
203.123.23.192	A+PTR	192.203-123-23.1500adsl.qala.com.sg
203.123.23.194	A+PTR	194.203-123-23.1500adsl.qala.com.sg
203.123.23.198	A	198.203-123-23.1500adsl.qala.com.sg
203.123.23.206	A	206.203-123-23.1500adsl.qala.com.sg
203.123.23.209	A+PTR	209.203-123-23.1500adsl.qala.com.sg
203.123.23.213	A	213.203-123-23.1500adsl.qala.com.sg
203.123.23.214	A	214.203-123-23.1500adsl.qala.com.sg
203.123.23.214	A	gatewayhotel.qalaip.com
203.123.23.228	A	228.203-123-23.1500adsl.qala.com.sg
203.123.23.233	A	233.203-123-23.1500adsl.qala.com.sg
203.123.23.235	A	235.203-123-23.1500adsl.qala.com.sg
203.123.23.236	A	236.203-123-23.1500adsl.qala.com.sg
203.123.23.240	A+PTR	240.203-123-23.1500adsl.qala.com.sg
203.123.23.244	A	244.203-123-23.1500adsl.qala.com.sg
203.123.23.249	A	249.203-123-23.1500adsl.qala.com.sg
203.123.23.250	A	250.203-123-23.1500adsl.qala.com.sg
203.123.25.124	A+PTR	124.203-123-25.leased.qala.com.sg
203.123.26.2	PTR	2.203.123.26.static.m1net.com.sg
203.123.26.2	A	2.203-123-26.1500adsl.qala.com.sg
203.123.27.226	PTR	226.203-123-27.1500adsl.qala.com.sg
203.123.27.226	A	mail.cord.com.sg
203.123.28.3	PTR	3.203-123-28.leased-203-123-28.qala.com.sg
203.123.28.36	A	darularqam.org.sg
203.123.28.147	A+PTR	mail.boi.com.sg
203.123.28.168	A	sg.zyxel.com
203.123.28.187	A	raffles-shipchartering.com.sg
203.123.28.187	A	mail.raffles-shipchartering.com.sg
203.123.28.194	PTR	194.203-123-28.leased-203-123-28.qala.com.sg
203.123.28.194	A	smtp.bossard.com.sg
203.123.28.198	A	bms.bossard.com.sg
203.123.30.91	A	91.203-123-30.leased.qala.com.sg
203.123.30.99	A+PTR	99.203-123-30.leased.qala.com.sg
203.123.30.198	A	www.telahin.com
203.123.31.1	PTR	1.203-123-31.static.qala.com.sg
203.123.31.2	PTR	2.203-123-31.static.qala.com.sg
203.123.31.50	PTR	50.203-123-31.static.qala.com.sg
203.123.31.51	PTR	51.203-123-31.static.qala.com.sg
203.123.31.81	PTR	81.203-123-31.static.qala.com.sg
203.123.31.97	PTR	97.203-123-31.static.qala.com.sg
203.123.31.114	PTR	114.203-123-31.static.qala.com.sg
203.123.31.144	PTR	144.203-123-31.static.qala.com.sg
203.123.31.146	PTR	146.203-123-31.static.qala.com.sg
203.123.31.147	PTR	147.203-123-31.static.qala.com.sg
203.123.31.161	PTR	161.203-123-31.static.qala.com.sg
203.123.31.162	PTR	162.203-123-31.static.qala.com.sg
203.123.31.178	PTR	178.203-123-31.static.qala.com.sg
203.123.31.179	PTR	179.203-123-31.static.qala.com.sg
203.123.31.195	PTR	195.203-123-31.static.qala.com.sg
203.123.31.243	PTR	243.203-123-31.static.qala.com.sg